<template>
    <div class="upload-container">
        <el-button icon='upload' :style="{background:color,borderColor:color}" @click=" dialogVisible=true"
                   type="primary">上传图片
        </el-button>
        <el-dialog :visible.sync="dialogVisible">
            <el-upload class="editor-slide-upload"
                       :action="uploadHost"
                       name="picture"
                       :with-credentials="true"
                       :headers="uploadHeaders"
                       :multiple="true"
                       :file-list="fileList"
                       :show-file-list="true"
                       list-type="picture-card"
                       :on-remove="handleRemove"
                       :on-success="handleSuccess"
                       :before-upload="beforeUpload">
                <el-button size="small" type="primary">Upload</el-button>
            </el-upload>
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="handleSubmit">确 定</el-button>
        </el-dialog>
    </div>
</template>

<script>
    // import { getToken } from 'api/qiniu'
    import {getToken, setToken, removeToken} from '@/utils/auth'
    import Constant from '@/env'
    import {mapState, mapMutations} from 'vuex'

    export default {
        name: 'editorSlideUpload',
        props: {
            color: {
                type: String,
                default: '#20a0ff'
            }
        },
        data() {
            return {
                dialogVisible: false,
                listObj: {},
                fileList: [],
                uploadHeaders: {}
            }
        },
        mounted() {
            // 添加上传headers
            this.uploadHeaders["token"] = getToken()
            this.uploadHeaders["userId"] = this.userId
        },
        computed: {
            ...mapState({
                'userId': state => state.user.userId,
            }),
            uploadHost() {
                return Constant.baseUrl + '/crowd-api/api/image/upload'
            }
        },
        methods: {
            checkAllSuccess() {
                return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
            },
            handleSubmit() {
                const arr = Object.keys(this.listObj).map(v => this.listObj[v])
                if (!this.checkAllSuccess()) {
                    this.$message('请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！')
                    return
                }
                this.$emit('successCBK', arr)
                this.listObj = {}
                this.fileList = []
                this.dialogVisible = false
            },
            handleSuccess(response, file) {
                const uid = file.uid
                const objKeyArr = Object.keys(this.listObj)
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        this.listObj[objKeyArr[i]].url = response.imageUrl
                        this.listObj[objKeyArr[i]].hasSuccess = true
                        return
                    }
                }
            },
            handleRemove(file) {
                const uid = file.uid
                const objKeyArr = Object.keys(this.listObj)
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        delete this.listObj[objKeyArr[i]]
                        return
                    }
                }
            },
            beforeUpload(file) {
                const _self = this
                const _URL = window.URL || window.webkitURL
                const fileName = file.uid
                this.listObj[fileName] = {}
                return new Promise((resolve, reject) => {
                    const img = new Image()
                    img.src = _URL.createObjectURL(file)
                    img.onload = function () {
                        _self.listObj[fileName] = {
                            hasSuccess: false,
                            uid: file.uid,
                            width: this.width,
                            height: this.height
                        }
                    }
                    resolve(true)
                })
            }
        }
    }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
    .upload-container {
        .editor-slide-upload {
            margin-bottom: 20px;
        }
    }
</style>
